<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000"><div>Dear All,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I like to display the variable "value" from the attached small netcdf file. I feel the pressure level variable is in the group 'IWC/PressureGrid'. For this I created the ctl :<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>dset MLS-Aura_L3DB-IWC_v04-24-c01_2022d365.nc<br>title MLS IWC<br>dtype netcdf<br>undef -999.99<br>xdef 72 linear -177.5 5.0<br>ydef 45 linear -88.0 4.0<br>zdef 29 levels 1000, 825.4042, 681.2921, 562.3413, 464.1589, 383.1187, 316.2278, 261.0157, 215.4435, 177.8279, 146.7799, 121.1528, 100, 82.54042, 68.1292, 56.23413, 46.41589, 38.31187, 31.62278, 26.10157, 21.54435, 17.78279, 14.67799, 12.11528, 10, 1, 0.1, 0.01, 0.001<br>tdef 1 linear 1DEC2022 1dy<br>vars 1<br>/IWC/PressureGrid/value=>val 29 t,z,x,y IWC (mg/m3)<br>endvars<br><br data-mce-bogus="1"></div><div>But, it does not works. It seems it does not matches with the variable!<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);">ga-> d val </span><br><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);">Error: Variable /IWC/PressureGrid/value not in netcdf file </span><br><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);">Data Request Error: Error for variable 'val' </span><br><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);"> Error ocurred at column 1 </span><br><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);">DISPLAY error: Invalid expression </span><br><span data-mce-style="color: #993366;" style="color: rgb(153, 51, 102);"> Expression = val</span><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>i am using Grads 2.0.a9. A portion from the ncdump is:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>=========================<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>group: IWC\ PressureGrid {<br> dimensions:<br> lat = 45 ;<br> lon = 72 ;<br> lev = 29 ;<br> time = 1 ;<br> nv = 2 ;<br> variables:</div><div><br data-mce-bogus="1"></div><div>....<br data-mce-bogus="1"></div><div>...<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>float value(time, lev, lon, lat) ;<br> string value:long_name = "Average Value of Cloud Ice" ;<br> string value:units = "mg/m!U3!N" ;<br> value:_FillValue = -999.99f ;<br> string value:comments = "The average value in a bin" ;<br>============================<br><br data-mce-bogus="1"></div><div>Please suggest, where to modify in the ctl.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thanks and Regards,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Mahakur<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></div></body></html>